Table 3

Comparisons of characteristics between subjects with bilateral and unilateral cataract surgery

Unilateral cataract surgery with
Bilateral cataract surgery (n=151)Minimal cataract in fellow eye (n=43)p Value*Significant cataract in fellow eye (n=87)p Value*
Age, years69.7 (6.8)65.3 (7.8)<0.00170.5 (6.7)0.403
Gender, male77 (51.0)28 (65.1)0.10144 (50.6)0.950
Age-related macular degeneration13 (8.6)5 (11.9)0.51610 (11.5)0.468
Diabetic retinopathy48 (31.8)14 (33.3)0.85015 (17.4)0.016
Glaucoma14 (9.3)3 (7.0)0.63910 (11.5)0.583
Any cardiovascular disease22 (14.6)7 (16.3)0.78117 (19.5)0.318
Current cigarette smoking13 (8.6)5 (11.6)0.54711 (12.6)0.320
Low socioeconomic status72 (47.7)16 (37.2)0.22436 (41.4)0.347
Mean Rasch score (95% CI)3.38 (3.17 to 3.58)3.39 (3.02 to 3.77)0.9412.99 (2.72 to 3.25)0.021
Adjusted mean Rasch score (95% CI)3.25 (2.99 to 3.50)3.22 (2.78 to 3.66)0.8972.81 (2.46 to 3.16)0.019
  • Data are presented as mean (SD) or number (%), as appropriate.

  • Cardiovascular disease is defined as a history of angina, myocardial infarction or stroke; low socioeconomic status is defined as having a primary or lower education and an individual monthly income less than $S2000.

  • * p Value to test for difference between bilateral cataract surgery (common) compared unilateral cataract surgery with a minimal cataract in fellow eye, significant cataract in fellow eye, presenting visual acuity worse than or equal to 6/12 and presenting visual acuity better than 6/12 in fellow eye, respectively, based on either a t test or χ2 test, as appropriate.

  • Adjusted for age, gender, cardiovascular disease, current cigarette smoking status, low socioeconomic status and the presence of eye diseases (including age-related macular degeneration, diabetic retinopathy and glaucoma).